*,
*:after,
*:before {
    box-sizing: border-box;
}

html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section,
summary,
time,
mark,
audio,
video,
input {
    margin: 0;
    padding: 0;
    border: none;
    outline: 0;
    font-family: STHeitiSC-Light;
    font: inherit;
    vertical-align: baseline;
}

html,
body,
form,
fieldset,
p,
div,
h1,
h2,
h3,
h4,
h5,
h6 {
    -webkit-text-size-adjust: none;
}

article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
    display: block;
}

body {
    font-family: arial, sans-serif;
}

ol,
ul {
    list-style: none;
}

blockquote,
q {
    quotes: none;
}

blockquote:before,
blockquote:after,
q:before,
q:after {
    content: '';
    content: none;
}

ins,
a {
    text-decoration: none;
}

del {
    text-decoration: line-through;
}

table {
    border-collapse: collapse;
    border-spacing: 0;
}

img {
    display: inline-block;
}

input,
textarea {
    border: none;
    background: none;
    outline: none;
    -webkit-appearance: none;
}

* {
    -webkit-tap-highlight-color: transparent;
    -moz-tap-highlight-color: transparent;
    -ms-tap-highlight-color: transparent;
    -o-tap-highlight-color: transparent;
}

.a {
    width: 100px;
    height: 100px;
    margin: 300px auto;
    border-radius: 50%;
    position: relative;
    ul {
        li {
            width: 10px;
            height: 40px;
            background: #CCC;
            position: absolute;
            top: -50px;
            left: 50%;
            margin-left: -15px;
            transform-origin: 15px 100px;
            animation: ff 1.2s infinite;
            &:nth-child(2) {
                transform: rotate(30deg);
                animation-delay: .1s;
            }
            &:nth-child(3) {
                transform: rotate(60deg);
                animation-delay: .2s;
            }
            &:nth-child(4) {
                transform: rotate(90deg);
                animation-delay: .3s;
            }
            &:nth-child(5) {
                transform: rotate(120deg);
                animation-delay: .4s;
            }
            &:nth-child(6) {
                transform: rotate(150deg);
                animation-delay: .5s;
            }
            &:nth-child(7) {
                transform: rotate(180deg);
                animation-delay: .6s;
            }
            &:nth-child(8) {
                transform: rotate(210deg);
                animation-delay: .7s;
            }
            &:nth-child(9) {
                transform: rotate(240deg);
                animation-delay: .8s;
            }
            &:nth-child(10) {
                transform: rotate(270deg);
                animation-delay: .9s;
            }
            &:nth-child(11) {
                transform: rotate(300deg);
                animation-delay: 1s;
            }
            &:nth-child(12) {
                transform: rotate(330deg);
                animation-delay: 1.1s;
            }
        }
    }
}

@keyframes ff {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}